Convert CONFIG_ARMV7_SECURE_BASE et al to Kconfig

This converts the following to Kconfig:
   CONFIG_ARMV7_SECURE_BASE
   CONFIG_ARMV7_SECURE_MAX_SIZE
   CONFIG_ARMV7_SECURE_RESERVE_SIZE

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/bananapi_m2_berry_defconfig b/configs/bananapi_m2_berry_defconfig
index 2d65d0f..a35fcdb 100644
--- a/configs/bananapi_m2_berry_defconfig
+++ b/configs/bananapi_m2_berry_defconfig
@@ -6,6 +6,7 @@
 CONFIG_DRAM_CLK=576
 CONFIG_MMC0_CD_PIN="PH13"
 CONFIG_USB1_VBUS_PIN="PH23"
+# CONFIG_HAS_ARMV7_SECURE_BASE is not set
 CONFIG_AHCI=y
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
 CONFIG_SPL_I2C=y